Harley Drivetrain
Harley Bike Drivetrain Parts at JJ Motorsports
Upgrade your Harley's drivetrain for smoother power delivery and reliability with components from JJ Motorsports. Our selection includes transmission mounting plates, offset sprockets, mechanical reverse kits, starter spacers, pulley spacers, and primary covers designed for heavy-duty use, easy bolt-in installation, and enhanced performance. Compatible with Big Twins, Softail, Dyna, and more, these parts feature chrome finishes, billet aluminum, and CNC-machined steel for corrosion resistance and custom fitment.
Shop trusted brands like Paughco for primary covers and PBI for sprockets. Explore related categories such as Harley engine parts for rebuilds or Harley suspension for balanced setups.
Top Harley Drivetrain Products
- PAUGHCO Transmission Plate - OE Type 4-Speed 218 – Heavy-duty steel for Big Twins with 4-speed transmissions.
- PBI Offset Transmission Sprocket - 22-Tooth 281-22 – CNC-machined chromoly steel with 0.750" offset for 530 chains.
- MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 – Lightweight aluminum with electronic cut-off for easy parking.
- TERRY COMPONENTS Starter Spacer 779000 – Billet aluminum, 1-1/2" thick for longer starters.
- PINGEL Rear Pulley Spacer 62051 – Billet aluminum for wider tires up to 142mm.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
PAUGHCO Transmission Plate - OE Type 4-Speed 218
PAUGHCO
$151.95If you're running a four-speed Big Twin—whether it's a stock Knucklehead or a modern custom build—this transmission plate is engineered to handle the demands of real-world riding and racing. PAUGHCO's OE Type 4-Speed 218 delivers the durability and...11050011- SKU:
- 11050011
- Availability:
- Ships Same Business Day
- Weight:
- 3.74 LBS
- MATERIAL:
- STEEL
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TRANSMISSION TYPE:
- 4-SPEED
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNTING PLATE
$151.95Qty in Cart: 0Quantity:Price:$151.95Subtotal: -
PAUGHCO Plate - 5/4 Speed Conversion 218-1
PAUGHCO
$151.95If you're running a Big Twin with a four-speed transmission and need a reliable, purpose-built conversion solution, the PAUGHCO Plate 218-1 eliminates the guesswork of custom fabrication. This heavy-duty plate integrates seamlessly into Paughco Easyride...11050012- SKU:
- 11050012
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- COLOR/FINISH:
- CHROME
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNTING PLATE
- TYPE:
- TRANSMISSION
- MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
$151.95 -
PAUGHCO Transmission Mounting Plate 218-A
PAUGHCO
$112.95If you're running a Softail 5-speed transmission in a rigid Paughco frame, this mounting plate is the critical interface that ensures proper transmission alignment and stability under load. A precision-engineered solution eliminates guesswork and...11050013- SKU:
- 11050013
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- MOUNTING PLATE
- TRANSMISSION TYPE:
- 5-SPEED
- TYPE:
- TRANSMISSION
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
$112.95Qty in Cart: 0Quantity:Price:$112.95Subtotal: -
PBI Offset Transmission Sprocket - 22-Tooth 281-22
PBI
$125.15Precise sprocket alignment is critical to chain longevity and drivetrain efficiency—even slight misalignment accelerates wear and power loss. The PBI 22-Tooth Offset Transmission Sprocket delivers the exact geometric correction needed to optimize your...PBI28122- SKU:
- PBI28122
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 22
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- TYPE:
- MAINSHAFT
- MATERIAL:
- STEEL
- UNITS:
- EACH
$125.15Qty in Cart: 0Quantity:Price:$125.15Subtotal: -
PBI Offset Transmission Sprocket - 23-Tooth 281-23
PBI
$130.90Precision sprocket alignment is critical to chain longevity and power delivery in high-performance applications. The PBI 23-Tooth Offset Transmission Sprocket gives you the exact geometry needed to optimize drivetrain geometry without compromise. Built...PBI28123- SKU:
- PBI28123
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- TOOTH COUNT:
- 23
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
$130.90 -
PBI Offset Transmission Sprocket - 24-Tooth 281-24
PBI
$142.05Precise sprocket alignment is critical for chain longevity, power delivery, and driveline efficiency in high-performance applications. The PBI Offset Transmission Sprocket compensates for late-model mainshaft geometry, eliminating the chain runout and...PBI28124- SKU:
- PBI28124
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- CHAIN SIZE:
- 530
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 24
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- COLOR/FINISH:
- NICKEL
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$142.05 -
PBI Offset Transmission Sprocket - 23-Tooth 283-23
PBI
$118.35Precision sprocket selection directly impacts your transmission's efficiency, longevity, and power delivery to the rear wheel. The PBI 23-Tooth Offset Transmission Sprocket delivers the durability and accuracy required for high-performance racing and...12120137- SKU:
- 12120137
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- CHAIN SIZE:
- 530
- TOOTH COUNT:
- 23
- TYPE:
- MAINSHAFT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- NICKEL
- RIDING STYLE:
- STREET
- OFFSET IMPERIAL:
- 0.500'
- UNITS:
- EACH
$118.35 -
PBI Transmission Mainshaft Sprocket - 19-Tooth - XL 277-19
PBI
$71.85A transmission mainshaft sprocket is critical to reliable power delivery in high-performance drivetrains—any runout or spline wear will compromise acceleration response and create dangerous drivetrain slack. The PBI 19-tooth sprocket eliminates these...DS191081- SKU:
- DS191081
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- SPROCKET
- COLOR/FINISH:
- SILVER
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 19
$71.85Qty in Cart: 0Quantity:Price:$71.85Subtotal: -
PBI Transmission Mainshaft Sprocket - 22-Tooth - XL 277-22
PBI
$82.80A transmission mainshaft sprocket is one of the most critical drivetrain components—it directly affects power delivery, acceleration response, and overall gear ratios in your racing setup. The PBI 22-Tooth XL 277-22 is precision-engineered from premium...DS191091- SKU:
- DS191091
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- CHAIN SIZE:
- 530
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 22
- COLOR/FINISH:
- SILVER
- MATERIAL:
- STEEL
- TYPE:
- MAINSHAFT
- UNITS:
- EACH
- PRODUCT NAME:
- SPROCKET
$82.80 -
PBI Offset Transmission Sprocket - 21-Tooth 281-21
PBI
$113.25Precision chain alignment is critical to maximizing drivetrain efficiency and extending sprocket life in high-performance applications. The PBI 21-Tooth Offset Transmission Sprocket delivers the exact geometric compensation needed to optimize your...PBI28121- SKU:
- PBI28121
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- MATERIAL:
- STEEL
- CHAIN SIZE:
- 530
- TYPE:
- MAINSHAFT
- COLOR/FINISH:
- NICKEL
- OFFSET IMPERIAL:
- 0.750'
- RIDING STYLE:
- STREET
- TOOTH COUNT:
- 21
- PRODUCT NAME:
- SPROCKET
- UNITS:
- EACH
$113.25 -
MOTOR TRIKE Mechanical Reverse Kit MTTR-0025
MOTOR TRIKE INC
$1,495.95Adding reverse capability to your trike dramatically expands its usability—no more awkward dismounts or manual repositioning in tight spaces. The MOTOR TRIKE Mechanical Reverse Kit MTTR-0025 delivers straightforward, reliable reverse operation without...11030031- SKU:
- 11030031
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- MECHANICAL REVERSE KIT
- FEATURES:
- HYDRAULIC CLUTCH
- UNITS:
- KIT
- STYLE:
- REPLACEMENT
$1,495.95 -
TERRY COMPONENTS Starter Spacer 779000
TERRY COMPONENTS
$142.95When upgrading to a high-output aftermarket starter, the factory fuel filler neck often sits too close to the enlarged motor, creating clearance issues that compromise installation and aesthetics. The TERRY COMPONENTS Starter Spacer 779000 solves this...DS196233- SKU:
- DS196233
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- COLOR/FINISH:
- POLISHED
- WIDTH IMPERIAL:
- 1-1/2'
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- SPACER BLOCK
$142.95 -
PINGEL Rear Pulley Spacer 62051
PINGEL
$86.95Maximize your tire options without sacrificing rear-wheel fitment. The PINGEL Rear Pulley Spacer 62051 enables you to run wider 142mm tires while maintaining factory geometry and clearance—critical for drag racing, street performance, and competitive...12010098- SKU:
- 12010098
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MOUNTING POSITION:
- REAR
- UNITS:
- EACH
- MATERIAL:
- BILLET ALUMINUM
- PRODUCT NAME:
- SPACER
- TYPE:
- PULLEY
- COLOR/FINISH:
- RAW
- RIDING STYLE:
- STREET
$86.95 -
PAUGHCO Inner Primary Cover - Chrome 752
PAUGHCO
$239.95The PAUGHCO Inner Primary Cover keeps your primary drivetrain protected from debris and contamination while maintaining a polished, factory-correct appearance. Whether you're running a stock setup or a high-performance build, this chrome cover shields...11070187- SKU:
- 11070187
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- INNER PRIMARY
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
PAUGHCO Outer Primary Cover 751
PAUGHCO
$314.95The PAUGHCO Outer Primary Cover 751 protects your primary drive system from debris, moisture, and contamination while maintaining a clean, factory-finished appearance. This cover is engineered to preserve primary component longevity and reduce...11070190- SKU:
- 11070190
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- COVER
- FEATURES:
- FOR USE WITH COMPENSATING SPROCKET
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$314.95 -
PAUGHCO Inner Primary Cover - Black B752
PAUGHCO
$251.95The PAUGHCO Inner Primary Cover B752 protects your primary drivetrain from contamination and heat while maintaining clean aesthetics on your build. This OEM-quality black cover integrates seamlessly with stock and custom primary assemblies, ensuring...11070191- SKU:
- 11070191
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
$251.95Qty in Cart: 0Quantity:Price:$251.95Subtotal: -
PAUGHCO Inner Primary Cover - Black B753E
PAUGHCO
$251.95The PAUGHCO Inner Primary Cover serves as both a protective barrier and a finished aesthetic element for your primary drivetrain. A quality inner primary cover shields critical components from debris and contamination while maintaining a clean,...11070192- SKU:
- 11070192
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- STREET
- TYPE:
- INNER PRIMARY
- COLOR/FINISH:
- GLOSS
$251.95Qty in Cart: 0Quantity:Price:$251.95Subtotal: -
PAUGHCO Outer Primary Cover B750
PAUGHCO
$317.95The PAUGHCO Outer Primary Cover B750 protects your primary drive system from contamination and heat while maintaining clean aesthetics on your build. This CNC-precision cover ensures reliable performance by sealing critical drivetrain components against...11070193- SKU:
- 11070193
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- FEATURES:
- FOR USE WITHOUT COMPENSATING SPROCKET
- COLOR/FINISH:
- GLOSS
- COLOR/FINISH:
- BLACK
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OUTER PRIMARY
- UNITS:
- EACH
$317.95 -
PAUGHCO Derby Cover B757
PAUGHCO
$69.95The PAUGHCO Derby Cover B757 delivers clean, finished aesthetics to your primary cover while maintaining stock compatibility with Harley-Davidson applications. Whether you're running an OEM setup or upgrading to PAUGHCO's outer primary covers, this derby...11070195- SKU:
- 11070195
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- DERBY
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- MOUNTING STYLE:
- 8 HOLE
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$69.95 -
PAUGHCO Inspection Cover B758
PAUGHCO
$32.95The PAUGHCO Inspection Cover B758 provides reliable access to your primary drive system while maintaining a clean, factory-correct appearance. Whether you're running stock Harley-Davidson components or upgraded PAUGHCO outer primary covers, this...11070196- SKU:
- 11070196
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MOUNTING STYLE:
- 2 HOLE
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- GLOSS
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- INSPECTION
$32.95
